SOLUTION: solve x + 3y + z = 1 2x – y – z = 6 5x + y + z = 1 using matrices.

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Question 884623: solve x + 3y + z = 1 2x – y – z = 6
5x + y + z = 1
using matrices.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!

A=%28matrix%283%2C3%2C1%2C3%2C1%2C2%2C-1%2C-1%2C5%2C1%2C1%29%29
abs%28A%29=-14
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.
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A%5Bx%5D=%28matrix%283%2C3%2C1%2C3%2C1%2C6%2C-1%2C-1%2C1%2C1%2C1%29%29
abs%28A%5Bx%5D%29=-14
.
.
.
A%5By%5D=%28matrix%283%2C3%2C1%2C3%2C1%2C2%2C6%2C-1%2C5%2C1%2C1%29%29
abs%28A%5By%5D%29=-28
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.
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A%5Bz%5D=%28matrix%283%2C3%2C1%2C3%2C1%2C2%2C-1%2C6%2C5%2C1%2C1%29%29
abs%28A%5Bz%5D%29=-84
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x=abs%28A%5Bx%5D%29%2Fabs%28A%29=%28-14%29%2F%28-14%29=1
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y=abs%28A%5By%5D%29%2Fabs%28A%29=%28-28%29%2F%28-14%29=2
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z=abs%28A%5Bz%5D%29%2Fabs%28A%29=%2884%29%2F%28-14%29=6
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